Understanding Climate Change

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Questions and Answers

Which of the following is a primary cause of the rapid warming that the world is currently experiencing?

  • The natural cycle of the Earth becoming warmer after a period of being colder.
  • Natural variations in temperature, rainfall, and wind patterns over decades.
  • Increased volcanic activity releasing greenhouse gases into the atmosphere.
  • Human activities, especially the burning of fossil fuels. (correct)

How do increasing greenhouse gas emissions contribute to rising global temperatures?

  • By creating a barrier that prevents heat from escaping the Earth's atmosphere. (correct)
  • By reflecting sunlight away from the Earth's surface.
  • By absorbing harmful UV radiation before it reaches the Earth.
  • By increasing the Earth's albedo, causing it to absorb more sunlight.

Besides warmer temperatures, what are some other consequences of climate change?

  • More predictable weather patterns and decreased natural disasters.
  • Intense droughts, water scarcity, and rising sea levels. (correct)
  • A decrease in the frequency and intensity of wildfires.
  • Increased biodiversity and stability of ecosystems.

Why are people living in small island developing states considered more vulnerable to climate change impacts?

<p>They are already experiencing sea-level rise and saltwater intrusion, leading to displacement. (A)</p>
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According to a 2018 report, what is the maximum global temperature rise that scientists and government reviewers agreed would help avoid the worst climate impacts?

<p>1.5C (A)</p>
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While emissions affect everyone, which of the following is true regarding their distribution?

<p>A small number of countries produce a disproportionately large share of emissions. (B)</p>
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What are the three broad categories of action to combat climate change?

<p>Cut emissions, adapt to climate impacts, and finance required adjustments. (A)</p>
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To keep warming below 1.5C, what percentage of emissions cuts must be in place by 2030?

<p>50% (C)</p>
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What's a key benefit of early warning systems for disasters in the context of adapting to climate consequences?

<p>They save lives and property, delivering benefits up to 10 times the initial cost. (C)</p>
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What is the commitment that industrialized countries need to fulfill to help developing countries adapt and move towards greener economies?

<p>Provide $100 billion a year to developing countries. (A)</p>
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Flashcards

Climate Change

Variations in temperature, rainfall, wind, and other elements over decades or more, accelerated by human activities like burning fossil fuels.

Greenhouse Gas Emissions

Gases, such as carbon dioxide and methane, that trap the sun's heat, leading to rising temperatures.

Net Zero Emissions

A commitment by countries to balance emissions and removals of greenhouse gases by 2050.

Climate Adaptation

Actions taken to reduce vulnerability to the effects of climate change, such as droughts, sea-level rise, and extreme weather events.

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Energy Transition

The process of switching from fossil fuels to renewable energy sources to reduce greenhouse gas emissions.

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Climate Refugees

People who are displaced from their homes due to the impacts of climate change, like rising sea levels or extreme weather events.

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Paris Agreement

A global agreement where countries agreed to combat climate change and limit global warming to well below 2, preferably to 1.5 degrees Celsius, compared to pre-industrial levels.

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Study Notes

  • Climate change can occur naturally with variations in temperature, rainfall, and wind over decades or more.
  • The current rapid warming is primarily due to human activities that burn fossil fuels to create greenhouse gas emissions.
  • Greenhouse gas emissions from human activity trap the sun's heat and increase temperatures.
  • Examples of greenhouse gas emissions that cause climate change:
  • Carbon dioxide
  • Methane
  • Burning fossil fuels, clearing land and forests
  • Landfills for garbage
  • Energy, industry, agriculture and waste disposal are major emitters.
  • Greenhouse gas concentrations are at their highest levels in 2 million years and continue to rise.
  • The earth is about 1.1°C warmer than in the 1800s, and the last decade was the warmest on record.
  • Climate change consequences:
  • Intense droughts
  • Water scarcity
  • Severe fires
  • Rising sea levels
  • Flooding
  • Melting polar ice
  • Catastrophic storms
  • Declining biodiversity.
  • Climate change affects:
  • Health
  • Food production
  • Housing
  • Safety
  • Work
  • Some communities are already being displaced by conditions like sea-level rise and saltwater intrusion.
  • Limiting global temperature rise to no more than 1.5°C would help avoid the worst climate impacts.
  • Current carbon dioxide emissions could increase global temperature by as much as 4.4°C by the end of the century.
  • The 100 least-emitting countries generate 3 per cent of total emissions.
  • The 10 largest emitters contribute 68 per cent of emissions.
  • There are three board categories of action to take:
  • Cut emissions
  • Adapt to climate impacts
  • Finance required adjustments.
  • Switching energy systems from fossil fuels to renewables like solar will reduce the emissions driving climate change.
  • A growing coalition of countries is committing to net zero emissions by 2050.
  • Roughly half of emissions cuts must be in place by 2030 to keep warming below 1.5°C.
  • Fossil fuel production must decline by roughly 6 per cent per year between 2020 and 2030.
  • Adapting to climate consequences protects people, homes, businesses, livelihoods, infrastructure and natural ecosystems.
  • Industrialized countries committed to provide $100 billion a year to developing countries, so they can adapt and move towards greener economies.

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